I got an Oracle8- Database running on WindowsNT on a remote system. If I try to start a job (report) with 'oracle enterprise manager dba studio' from a remote node I got the folowing error message:

** Report **
User: CRONON, Service: CRONON, Query: 0, Report: --INIT--
** Message **
Connect: observer
oralogon: oralogon failed in orlon
ora-12154: TNSer Servicename konnte nicht aufgelöst werden.
** Error **
NMI::Connection to the repository failed

Has one of you a clue?